Was the Devonian placoderm Titanichthys a suspension feeder? [PDF]
Royal Society Open Science, 2020 Large nektonic suspension feeders have evolved multiple times. The apparent trend among apex predators for some evolving into feeding on small zooplankton is of interest for understanding the associated shifts in anatomy and behaviour, while the spatial ...
Samuel J. Coatham +3 more
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New findings in a 400 million-year-old Devonian placoderm shed light on jaw structure and function in basal gnathostomes [PDF]
Scientific Reports, 2017 Arthodire placoderms have been proposed as the sister group of Chinese ‘maxillate’ placoderms plus all the more crownward gnathostomes. These basal groups provide key information for understanding the early evolution of jaws.
Yuzhi Hu, Jing Lu, Gavin C. Young
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Pelvic and reproductive structures in placoderms (stem gnathostomes)
Biological Reviews, 2014 ABSTRACTNewly discovered pelvic and reproductive structures within placoderms, representing some of the most crownward members of the gnathostome stem group and the most basal jawed vertebrates, challenge established ideas on the origin of the pelvic girdle and reproductive complexity.
Trinajstic, Katherine +4 more
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Placoderms from the Lower Devonian “placoderm sandstone” of the Holy Cross Mountains, Poland with biostratigraphical and palaeobiogeographical implications [PDF]
Acta Palaeontologica Polonica, 2017 The siliciclastic sequence of the Lower Devonian of the southern part of the Holy Cross Mountains in Poland is renown for abundant vertebrate fossils, including ostracoderm, sarcopterygian, acanthodian, chondrichthyan, and placoderm remains. Study of the
Piotr Szrek, Vincent Dupret
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Histology of “placoderm” dermal skeletons: Implications for the nature of the ancestral gnathostome [PDF]
Journal of Morphology, 2013 AbstractThe vertebrate dermal skeleton has long been interpreted to have evolved from a primitive condition exemplified by chondrichthyans. However, chondrichthyans and osteichthyans evolved from an ancestral gnathostome stem‐lineage in which the dermal skeleton was more extensively developed.
Giles, Sam +2 more
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Giant, swimming mouths: oral dimensions of extant sharks do not accurately predict body size in Dunkleosteus terrelli (Placodermi: Arthrodira) [PDF]
PeerJ, 2023 Background The size of Dunkleosteus and other late Devonian arthrodire placoderms has been a persistent problem in paleontology. The bony head and thoracic armor of these animals are typically the only elements preserved in the fossil record, with the ...
Russell Engelman
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A Silurian maxillate placoderm illuminates jaw evolution
Science, 2016 Jaws from the jawless Until a fossil called Entelognathus was found to contain a tripartite jaw a few years ago, it was believed that the skeletons of early osteichthyans (bony fish), the ancestors of all vertebrates, were derived independently of those of the earlier placoderms (so-called jawless fish). Zhu et al.
Min, Zhu +7 more
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Evolution of the vertebrate neurocranium: problems of the premandibular domain and the origin of the trabecula [PDF]
Zoological Letters, 2018 The subdivision of the gnathostome neurocranium into an anterior neural crest-derived moiety and a posterior mesodermal moiety has attracted the interest of researchers for nearly two centuries.
Shigeru Kuratani, Per. E. Ahlberg
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Devonian antiarch placoderms from Belgium revisited [PDF]
, 2013 ANR Program n° 2010 BLAN-607 “TERRES: Global perspectives on the terrestrialisation process”
Olive, S. +2 more
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Acta Limnologica Brasiliensia, 2014 AIM: This study aimed to evaluate the influence of river-dam axis and abiotic factors on the composition of Closteriaceae, Gonatozygaceae, Mesotaeniaceae and Peniaceae in a tropical reservoir METHODS: Water samples for physical, chemical and periphyton ...
Sirlene Aparecida Felisberto +2 more
exaly +3 more sources